package com.um.springboot.starter.utils;

import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
import java.io.UnsupportedEncodingException;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.KeySpec;

public class DesEncrypter {

	public static final String CD_KEY = "<<LE-WEISHENG>>";
	Cipher ecipher;
	Cipher dcipher;

	// 8-byte Salt

//	byte[] salt = {
//
//	(byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32,
//
//	(byte) 0x56, (byte) 0x35, (byte) 0xE3, (byte) 0x03
//
//	};

	byte[] salt = {

			(byte) 0xA9, (byte) 0x9A, (byte) 0xCC, (byte) 0x32,

			(byte) 0x56, (byte) 0x35, (byte) 0xED, (byte) 0x03

			};
	
	// Iteration count

	int iterationCount = 30;

	public DesEncrypter(String passPhrase) {

		try {

			// Create the key

			KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt,
					iterationCount);

			SecretKey key = SecretKeyFactory.getInstance(

			"PBEWithMD5AndDES").generateSecret(keySpec);

			ecipher = Cipher.getInstance(key.getAlgorithm());

			dcipher = Cipher.getInstance(key.getAlgorithm());

			// Prepare the parameter to the ciphers

			AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt,
					iterationCount);

			// Create the ciphers

			ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);

			dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);

		} catch (java.security.InvalidAlgorithmParameterException e) {

		} catch (java.security.spec.InvalidKeySpecException e) {

		} catch (javax.crypto.NoSuchPaddingException e) {

		} catch (java.security.NoSuchAlgorithmException e) {

		} catch (java.security.InvalidKeyException e) {

		}

	}

	@SuppressWarnings("hiding")
	public String encrypt(String str) {

		try {

			// Encode the string into bytes using utf-8

			byte[] utf8 = str.getBytes("UTF8");

			// Encrypt

			byte[] enc = ecipher.doFinal(utf8);

			// Encode bytes to base64 to get a string

			return new sun.misc.BASE64Encoder().encode(enc);

		} catch (javax.crypto.BadPaddingException e) {

		} catch (IllegalBlockSizeException e) {

		} catch (UnsupportedEncodingException e) {

		} catch (java.io.IOException e) {

		}

		return null;

	}

	public String decrypt(String str) {

		try {

			// Decode base64 to get bytes

			byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);

			// Decrypt

			byte[] utf8 = dcipher.doFinal(dec);

			// Decode using utf-8

			return new String(utf8, "UTF8");

		} catch (javax.crypto.BadPaddingException e) {

		} catch (IllegalBlockSizeException e) {

		} catch (UnsupportedEncodingException e) {

		} catch (java.io.IOException e) {

		}

		return null;

	}

	/**
	 * 判断字符串是否含有中文
	 */
	public static boolean isChineseCharacter(String chineseStr) {
		char[] charArray = chineseStr.toCharArray();
	    for (int i = 0; i < charArray.length; i++) {
	    	if ((charArray[i] >= 0x4e00) && (charArray[i] <= 0x9fbb)) {
		    	 //Java判断一个字符串是否有中文是利用Unicode编码来判断，
		    	 //  因为中文的编码区间为：0x4e00--0x9fbb
		      return true;
		    }
	    }
	    return false;
	}
	
	/**
	 * 密码加密
	 * @param pwd
	 * @return
	 */
	public static String pwdEncrypt(Object pwd){
		DesEncrypter des = new DesEncrypter(DesEncrypter.CD_KEY);		
		return des.encrypt(pwd.toString());
	}
	/**
	 * 密码解密
	 * @param pwd
	 * @return
	 */
	public static String pwdDecrypt(Object pwd){
		DesEncrypter des = new DesEncrypter(DesEncrypter.CD_KEY);		
		return des.decrypt(pwd.toString());
	}

	public static void main(String[] args) {
		System.out.println(pwdEncrypt("Ch18#3Ti@p85!"));
	}
}
